You see, as a submissive, your purpose is those you submit to. That's what a submissive is made for. But you still care about things like YOUR sexuality, YOUR fears, YOUR problems, YOUR ego.
A true submissive does not care about those things. A true submissive, if asked to by his Mistress, would suck the first cock that came in front of him.
Of course, none of this really matters, does it? I'm the one with the key to your chastity belt, so you're going to do what I say anyway.